CN103521666B - A kind of milled head and its equipment for being used to roll pipe screw thread and the pipe cylinder blank of application equipment processing - Google Patents

Abstract

The invention discloses a kind of milled head and its equipment for being used to roll pipe screw thread and the pipe cylinder blank of application equipment processing, wherein milled head includes at least two rolling wheels and sets a rolling wheel seat of rolling wheel, wherein rolling wheel includes a rolling wheel body and a rolling wheel shaft, rolling wheel body includes a rolling wheel pipe screw thread moulding section, the corresponding rolling wheel seat of rolling wheel has an axial activity space along the direction along rolling wheel shaft, the axial distance of the axial activity space for rolling wheel pipe screw thread moulding section correspondence screw thread 0.5 pitch to 1 pitch.Processing unit (plant) simple light of the present invention, is easy to large-scale popularization to use；And avoid recessive and dominant destruction to steel pipe body, improve screw thread compactness, threaded connection intensity and sealing security performance, using the present invention on the basis of pipe screw thread connection safety is improved, the external diameter or wall thickness for reducing steel pipe can be inquired into, so as to reduce steel for steel pipes amount, the environmental protection purpose of energy-saving and emission-reduction is reached.

Description

A kind of milled head and its equipment for being used to roll pipe screw thread and application equipment processing Pipe cylinder blank

Technical field

The present invention relates to steel pipe, pipe fitting and pipeline processing field, especially a kind of milled head for being used to roll pipe screw thread and Its equipment and the pipe cylinder blank of application equipment processing.

Background technology

Comparing cutting pipe screw thread due to rolling pipe screw thread has pipe screw thread mechanical coupling strength height, good seal performance etc. excellent Point, is paid attention to by increasing people.National inventing patent " CN200310111695.2 " and patent of invention Two kinds of rolled tube external screw thread processing methods disclosed in " CN200710106912.7 " are all first to carry out after axial punch circular conical surface The technique for carrying out pipe screw thread rolling and processing again.Technique is shaped compared to the cutting knife of pipe screw thread one, this processing technology needs profit Stamped workpieces are axially moved with taper die mechanical (or hydraulic pressure), first processing forms circular conical surface, then the rolling and processing on circular conical surface Pipe screw thread, otherwise, pipe screw thread tooth form is incomplete, and body is easily deformed or even ftractureed.

Current this rolled tube Thread Machining Process at least has following 3：

1. because rolled tube Thread Machining Process is set than current mantle fiber together either more than machining pipe screw thread technique Standby huge circular conical surface manufacturing procedure, it is not only time-consuming and very inconvenient for pipe network scene processing pipe screw thread operation, it is impossible to make People receives；

2. due to huge axial instantaneous stamping pressure, when the conical surface shapes, body material particularly welded tube welding seam material is easy By the destruction such as recessive and dominant, pipe screw thread product safety hidden danger is likely to result in.

3. because existing rolled tube cylinder blank external diameter is that, with the outer diameter of steel pipes depending on Cutting Process, external diameter is bigger than normal, in shape During into circular conical surface, the often conical surface of product internal diameter is more than 1:16, or conical surface length (height) be far longer than standard permission Length, cause rolled tube screw product endoporus reduction volume be more than standard allow outer diameter of steel pipes and thickness of steel pipe maximum deflection difference value it Add up caused maximum inner diameter reduction volume, there may be certain influence for fluid delivery stability.

To find out its cause, this is defect in above-mentioned binomial patent of invention technological design and formulated with cutting tube thread technology Steel tube standard external diameter caused by the reason such as rolled tube cylinder blank external diameter.

By foregoing description with analysis, we it is seen that：Solve the above problems, particularly omit axial punch technique, Simplify processing step, rolling pipe screw thread had both been met country and international standard, it is to promote rolling that current people's operating habit is met again The key point of this outstanding technique of pressure pipe screw thread.

The content of the invention

Pipe screw thread is rolled it is an object of the invention to provide a kind of be used as using corresponding certain pipe cylinder blank external diameter Standard pipe external diameter, stamped workpieces can not be axially moved by taper die mechanical (or hydraulic pressure) and process to form conical surface technique, The process that this is carried throughout only by rolling, the rolling and processing form seal conical tube spiral shell directly on pipe cylinder blank A kind of milled head and its equipment of line, make rolling taper pipe thread processing technology simple, practical and complete, and comply fully with The current operating habit of people.

In order to realize foregoing invention purpose, the invention discloses a kind of milled head for being used to roll pipe screw thread, including at least Two rolling wheels and the rolling wheel seat that the rolling wheel is set, wherein the rolling wheel includes a rolling wheel body and a rolling wheel Axle, the rolling wheel body includes a rolling wheel pipe screw thread moulding section, it is characterised in that the rolling wheel body phase correspondence rolling Pinch roller seat has an axial activity space on the direction along the rolling wheel shaft, and the axial distance of the axial activity space is described 0.5 pitch of rolling wheel pipe screw thread moulding section correspondence screw thread is to 1 pitch, to ensure that the rolling wheel sequentially enters rolling Pressure, is realized freely to tooth.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the rolling wheel body phase pair Radially have a radially movable space along the rolling wheel shaft in the rolling wheel seat, the radial direction in the radially movable space away from From for no more than the rolling wheel pipe screw thread moulding section correspondence screw thread 0.5 pitch.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the axial activity space With the radially movable space by being realized selected from structure described in following any group：

L) floating connection between the rolling wheel and the rolling wheel seat；

M) floating connection between the rolling wheel body and the rolling wheel shaft；

N) a) group and b) combination of group；

The floating connection is selected from：Axis hole floating connection or bearing floating connection.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the axial activity space And the radially movable space is realized by the floating connection between the rolling wheel and the rolling wheel seat, and it is described The rolling wheel body of rolling wheel is to be integrally formed or keyway cooperation with rolling wheel shaft；

The floating connection is selected from：Axis hole floating connection or bearing floating connection.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the axis hole floating connection Including：

O) the rolling wheel body shaft bore surface and the rolling wheel shaft surface are any curved or are the contact of arc company Connect；Or

P) surface is any curved at the axis hole link position between the rolling wheel shaft and the rolling wheel seat or is The contact connection of arc；Or

Q) the rolling wheel body shaft bore surface is connected with the contact that the rolling wheel shaft surface is the face of cylinder, and the rolling Pinch roller body axis hole port diameter is equal to pitch of the rolling wheel shaft diameter plus 0.5 to 1 correspondence rolling wheel screw thread；

R) surface is the contact on the face of cylinder at the axis hole link position between the rolling wheel shaft and the rolling wheel seat Connection, and the rolling wheel seat axis hole port diameter is equal to the rolling wheel shaft diameter plus 0.5 to 1 correspondence rolling wheel spiral shell The pitch of line.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the axis hole floating connection Including：

S) surface is any curved at axis hole link position between the rolling wheel shaft and the rolling wheel seat or is arc The contact connection of shape；Or

T) surface is the contact on the face of cylinder at the axis hole link position between the rolling wheel shaft and the rolling wheel seat Connection, and the rolling wheel seat axis hole port diameter is equal to the rolling wheel shaft diameter plus 0.5 to 1 correspondence rolling wheel spiral shell The pitch of line.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the bearing floating connection It is to connect to realize by needle roller.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the bearing floating connection It is to connect to realize by needle roller.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the pipe screw thread forming part The shape divided is taper pipe thread or straight pipe thread.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the rolling wheel body is in institute State pipe screw thread moulding section front end and further comprise a preformed sections, the shape of the preformed sections includes the face of cylinder, circle The conical surface, straight pipe thread, incomplete straight pipe thread, incomplete taper pipe thread or its combination.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the rolling wheel body is in institute State pipe screw thread moulding section front end and further comprise lead-in portion, the shape of the lead-in portion includes the conical surface, cambered surface, progressive song Face or its combination.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the rolling wheel body is in institute State preformed sections front end and further comprise lead-in portion, the shape of the lead-in portion include the conical surface, cambered surface, progressive curved surface or It is combined.

It is preferable to the of the invention milled head for being used to roll pipe screw thread, it is characterised in that the rolling wheel body is led Enter the cambered surface that is shaped as of part, the preformed sections are shaped as straight pipe thread, the shape of the pipe screw thread moulding section For taper pipe thread.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the milled head includes N Individual ring screw rolling wheel, the pitch axial length of first of incomplete pitch screw of each of which rolling wheel is set in the following manner Put：

U) wherein the first rolling wheel will be referred to as by any one rolling wheel, the pitch axial direction of its first incomplete pitch screw Length is equal to its pitch；

V) in the direction of the clock or counterclockwise first of the rolling wheel adjacent with first rolling wheel it is incomplete The pitch axial length of pitch screw reduces 1/N pitch successively, until reducing to 1/N pitch；

Wherein, N is the natural number more than or equal to 2.

It is preferable to the milled head for being used to roll pipe screw thread of the invention, it is characterised in that the lead-in portion, institute State preformed sections and the pipe screw thread moulding section is integral structure, or combining structure.

The invention also discloses a kind of pipe screw thread roll unit for including milled head described in any of the above-described, applied to adding The pipe cylinder blank of work one, further comprises：Support, power motor and speed change gear, Workpiece clamping device, hollow spindle, motor Switch, two axial guide pillars, slides；

Wherein, the upper part of the frame side is provided with a power motor and a speed change gear and a motor switch, the power There is a hollow spindle above motor, the main shaft of the power motor is connected by the speed change gear with the hollow spindle；

The upper part of the frame also has a clamping for being used to clamp the pipe cylinder blank to be processed and rotate it Device, the clamping device and the hollow spindle are concentric and are connected as a single entity；

The two axial guide pillars are arranged on the opposite side of the upper part of the frame, and parallel to the hollow spindle center line before After set；

The slide is arranged on described two axial guide pillars, can be slided along the axial guide pillar level；

The milled head floats and is arranged on the slide, concentric with the hollow spindle.

It is preferable to pipe screw thread roll unit of the invention, it is characterised in that the rolling wheel seat of the milled head is divided into Wheel seat is rolled on one and wheel seat is once rolled, the upper rolling wheel seat is slide construction, the lower rolling wheel seat is fixed structure； The rolling wheel seat is floated by a spring with one group of adjustment bolt with the slide in the roll unit to be connected；Wherein institute State and be respectively arranged with two rolling wheels on rolling wheel seat and the lower rolling wheel seat.

It is preferable to pipe screw thread roll unit of the invention, it is characterised in that the roll unit also includes a chamfering Device and/or a rolling cutoff device and/or a photoelectric induction device；

Wherein, the facing attachment floats and is arranged on relatively described power motor and the speed change gear one on the slide Side, it is concentric with the hollow spindle；

The rolling cutoff device, is arranged on the slide relatively described power motor speed change gear side, and described Hollow spindle is concentric；

Described photoelectric induction device is arranged on the rolling wheel seat in the milled head.

The invention also discloses a kind of pipe cylinder blank applied to foregoing any described roll unit processing, its feature It is, the external diameter of the pipe cylinder blank is the basic big footpath on corresponding international or national standard taper pipe thread datum plane With the average value of basic pitch diameter.

It is preferable to pipe cylinder blank of the invention, it is characterised in that

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN6, and pipe external diameter is 9.44 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN8, and pipe external diameter is 12.73 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN10, and pipe external diameter is 16.23 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN15, and pipe external diameter is 20.37 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN20, and pipe external diameter is 25.86 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN25, and pipe external diameter is 32.51 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN32, and pipe external diameter is 41.17 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN40, and pipe external diameter is 47.06 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN50, and pipe external diameter is 58.87 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN65, and pipe external diameter is 74.44 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN80, and pipe external diameter is 87.14 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN100, and pipe external diameter is 112.29 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN125, and pipe external diameter is 137.69 millimeters；

The pipe cylinder blank is used to roll 55 ° of conical tube external screw thread DN150, and pipe external diameter is 163.09 millimeters；

Or

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN6, and pipe external diameter is 9.87 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN8, and pipe external diameter is 13.05 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN10, and pipe external diameter is 16.49 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN15, and pipe external diameter is 20.5 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN20, and pipe external diameter is 25.84 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN25, and pipe external diameter is 32.34 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN32, and pipe external diameter is 41.1 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN40, and pipe external diameter is 47.17 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN50, and pipe external diameter is 59.21 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN65, and pipe external diameter is 71.43 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN80, and pipe external diameter is 87.34 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN90, and pipe external diameter is 100.05 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN100, and pipe external diameter is 112.7 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN125, and pipe external diameter is 139.68 millimeters；

The pipe cylinder blank is used to roll 60 ° of conical tube external screw thread DN150, and pipe external diameter is 166.52 millimeters；

Described pipe outside dimension tolerance is free tolerance.

The beneficial effects of the invention are as follows：Using the characteristic of revolving-rolling, pass through a kind of rolling of rolling pipe screw thread of the invention Pressure head and its equipment and the pipe cylinder blank of application equipment processing, are eliminated in rolling taper pipe thread technique at present axially Punching press circular conical surface process, solves the problems such as punching press recessive to body particularly welded tube welding seam and dominant destruction, realizes and mesh Forward position processed the basically identical processing method of pipe screw thread processing step with the mantle fiber of more than 100 years, simplified rolling pipe screw thread technique With practicality, and comply fully with the current operating habit of people, make piping network installation job site realize rolling and processing pipe screw thread into For possibility；At the same time, its unit weight of pipe screw thread product and the rolling of pipe cylinder blank rolling forming of the present invention are employed Original steel pipe unit weight before pressure is the same and is acted on by rolling flow harden, is reducing outer diameter of steel pipes and thinned steel pipe While wall thickness, improve pipe screw thread connection safety energy, it is ensured that pipe diameter dose of fluid delivered and stability, realize non- Go smithcraft method rolling and processing pipe screw thread technique make steel for steel pipes amount save target, saved a considerable number of steel pipe into There is provided a kind of method true of low-cost energy-saving emission reduction for this.

Processed using a kind of milled head and its equipment for being used to roll pipe screw thread of the present invention and using the equipment Pipe cylinder blank will be born a kind of outer diameter of steel pipes with basic on corresponding international or national standard taper pipe thread datum plane Based on the average value of big footpath and basic pitch diameter, the steel pipe new standard that wall thickness can be thinned, new material, promote Steel Tube Industry energy-conservation to subtract Row；Open conventional tube thread processing equipment and production structure updating is regenerated, improve China's relevant enterprise global market competition Power；The manufacture of tubing construction equipment is lifted revolutionaryly.

Brief description of the drawings

Below, referring to the drawings, for those skilled in the art, from the detailed description to the inventive method In, above and other objects, features and advantages of the invention will be evident.

Fig. 1, Fig. 3, Fig. 4 are three embodiments of the milled head of the present invention respectively (rolling wheel is decile distribution)；

Fig. 2 be Figure 1A-A to cross sectional plan view；

Fig. 5~Fig. 7 is to use axle between present invention rolling wheel body and the rolling wheel that is integrated of rolling wheel shaft and rolling wheel seat Hole coordinates the schematic diagram for having axially and radially activity space for realizing floating connection；

Fig. 8 is the end of the rolling wheel two assembling needle roller (bearing) that ring screw rolling wheel body of the present invention is integrated with rolling wheel shaft The schematic diagram for having axially and radially activity space of floating connection is realized using bearing fit between rolling wheel seat bearing hole；

Fig. 9 is present invention rolling wheel body with rolling wheel shaft as showing that integrally formed alternative solution-(flat) keyway coordinates It is intended to；

Figure 10 is the connection not floated using gapless axis hole stationary fit between present invention rolling wheel shaft and rolling wheel seat, Freely axial direction and radially movable schematic diagram are realized by the floating connection between rolling wheel body and rolling wheel shaft；

Figure 11 is but the company of non-floating using there is gap axis hole to be connected between present invention rolling wheel shaft and rolling wheel seat Connect, rely primarily on the floating connection between rolling wheel body and rolling wheel shaft to realize freely axial direction and radially movable schematic diagram；

Figure 12-Figure 13 is that present invention rolling wheel body and rolling wheel shaft are needle roller (bearing) floating connection to realize free axial direction With radially movable schematic diagram；

Figure 14-Figure 16 realizes free axial direction for present invention rolling wheel body and rolling three kinds of shaft hole matching floating connections of wheel shaft With the schematic diagram in radially movable space；

Figure 17-Figure 18 represents that present invention rolling wheel body thread forming portion can be taper pipe thread and cylindrical tube spiral shell respectively The structural representation of line；

Figure 19-Figure 23 is the detailed diagram of three parts in present invention rolling wheel body, is respectively：It is lead-in portion, preforming Part and all kinds of combination diagrams of taper pipe thread moulding section；

Figure 24 is present invention rolling wheel body three part：Importing, preforming and pipe screw thread shaped portion separate form schematic diagram；

Figure 25 and Figure 26 are that the axially and radially distribution mode of four rolling wheels in ring screw milled head of the invention is shown It is intended to；

Figure 27 and Figure 28 are the front view and side view of the roll unit of the milled head comprising the present invention；

Figure 29 is pipe cylinder blank outside dimension schematic diagram used in roll unit of the present invention；

Figure 30 is pipe cylinder blank outside dimension schematic diagram used in prior art device.

Reference：

1 support

2 power motors

21 (in power motor speed change gear) hollow spindles

3 motor switch

4 Workpiece clamping devices

5 pipe cylinder blanks

51 pipe cylinder blank external diameters of the present invention

52 pipe cylinder blank wall thickness of the present invention

53 national standard pipe cylinder blank internal diameters

54 prior art tube cylinder blank external diameters

55 prior art tube cylinder blank wall thickness

56 national standard pipe cylinder blank internal diameters

6 rolling cutoff devices

7 milled heads

71 handles

72 screw mandrels

73 or so two guide pillars

Wheel seat is rolled on 74

741 photoelectric induction devices

742 axle sleeves

75 times rolling wheel seats

76 regulating bolts

761 adjustment bolts 1

762 adjustment bolts 2

763 adjustment bolts 3

764 adjustment bolts 4

77 springs

781 axial gaps

782nd, 7821,7822 radial clearance

8 rolling wheels

81 rolling wheel shafts

811 rolling wheel shafts 1

812 rolling wheel shafts 2

813 rolling wheel shafts 3

814 rolling wheel shafts 4

815 flat keys

816 needle rollers

82 rolling wheel bodys

821 rolling wheel bodys 1

822 rolling wheel bodys 2

823 rolling wheel bodys 3

824 rolling wheel bodys 4

9 facing attachments

10 (moving sliding base) rocking handles

11 slides

111 (on slide) location-plates

12 (two) axial guide pillars

A (rolling wheel body) lead-in portion

The outer convex arc surface lead-in portions of A1

A2 circular conical surface lead-in portions

The progressive curved surface lead-in portions of A3

B (rolling wheel body) preformed sections

B1 straight pipe thread preformed sections

The incomplete taper pipe thread preformed sections of B2

B3 faces of cylinder preformed sections

The incomplete straight pipe thread preformed sections of B4

C (rolling wheel body) taper pipe thread moulding section

The pitch axial length of first rolling first of incomplete pitch screw of wheel body of C1

The pitch axial length of second rolling first of incomplete pitch screw of wheel body of C2

The pitch axial length of the 3rd rolling first of incomplete pitch screw of wheel body of C3

The pitch axial length of the 4th rolling first of incomplete pitch screw of wheel body of C4

Embodiment

The present invention is described in detail below in conjunction with preferred embodiment, it is noted that retouched described later In stating, although used term is selected from public term, some terms are then that applicant is sentenced by it Break and carry out selection, its detailed meanings should understand according to the spirit of the invention to be disclosed.

Milled head of the present invention refer to on pipe cylinder blank rolling and processing go out the device of pipe screw thread, main element Including for roll pipe screw thread several rolling wheels and for support or fixed rolling wheel rolling wheel seat.The rolling wheel bag Include and the rolling wheel body being molded for rolling screw-threads and the rolling positioned at rolling wheel body axis hole center are directly contacted with pipe cylinder blank Wheel pressing shaft, the rolling wheel processes axle by the rolling wheel shaft and the rolling wheel fit, and around pipe cylinder blank Line direction etc. point distribution.As needed, the milled head may be equipped with machinery, pneumatically or electrically hydraulic pressure, device so that described Rolling wheel seat and the rolling wheel can reasonably roll power and rolling in the activity in the radial direction of preprocessing pipe cylinder blank The pressure time is to adapt to the rolling and processing of different tube diameters and tubes of material cylinder blank.Other equipment is may be equipped with the case of necessity.

Activity space of the present invention should be understood to that there is a space can cause rolling wheel body in the space It is freely movable.Described axial activity space refers to activity space of the rolling wheel body on the axis direction of rolling wheel shaft. The axial distance of the axial activity space should be understood to the rolling wheel body on the axis direction along the rolling wheel shaft Can free movable ultimate range, the ultimate range should be 0.5 pitch of rolling wheel pipe screw thread moulding section correspondence screw thread To 1 pitch.It is preferred that, it is 0.5,0.6,0.7,0.8,0.9 or 1 pitch.Described rolling wheel pipe screw thread moulding section is Refer to the screw thread on rolling wheel body corresponding with the pipe screw thread for requiring to roll out.Described radially movable space refers to the rolling wheel body Activity space in the vertical direction for processing axis along the pipe cylinder blank, the radially movable space should be understood to described Roll wheel body pipe screw thread moulding section along the pipe cylinder blank process in the vertical direction of axis can relative preprocessing Guan Yuan The ultimate range of the free activity of post blank, the ultimate range should be no more than rolling wheel pipe screw thread moulding section correspondence screw thread 0.5 pitch.It is preferred that, it is 0.1,0.2,0.3,0.4 or 0.5 pitch.

Pitch of the present invention, depending on the specific different size of rolling and size pipe screw thread, the spiral shell on specific rolling wheel Line pitch determined by standard GB/T/T12716 (NPT), GB/T7306 (BSPT), GB/T7307 and corresponding international standard and It is adjusted accordingly.

There is pipe screw thread moulding section, described rolling wheel pipe screw thread shaping on rolling wheel external surface of the present invention Part refers to screw thread corresponding with the pipe screw thread for requiring to roll out, and can include straight pipe thread or taper pipe thread；It is described Straight pipe thread and taper pipe thread include：BSPT, NPT, the metric system and API standard straight pipe thread and taper pipe thread. In addition to above-mentioned pipe screw thread moulding section, it is preforming that the original position that rolling wheel body can also be processed in pipe cylinder blank is further added by one Part or lead-in portion, when the original position of pipe cylinder blank processing is pipe screw thread rolling and processing rolling wheel with pipe fitting most The position first contacted.The shape of the preformed sections includes the face of cylinder, circular conical surface, straight pipe thread, incomplete cylindrical tube spiral shell Line, incomplete taper pipe thread or its combination.When preformed sections are straight pipe thread, the tooth form and pipe spiral shell of straight pipe thread The tooth form of line moulding section is identical.It is non-complete when preformed sections are incomplete straight pipe thread or incomplete taper pipe thread The pitch of whole straight pipe thread or incomplete taper pipe thread is equal with the pitch of pipe screw thread moulding section screw thread, incomplete circle The tooth bottom of column jecket screw thread or incomplete taper pipe thread is identical with the tooth bottom of pipe screw thread moulding section screw thread, and crest is smaller. The shape of the lead-in portion includes the conical surface, cambered surface, progressive curved surface or its combination.Roll the situation of the shape of wheel body and combinations thereof Refer to following patent file：RU2443492C1、US20120011912A1、US3651678A、CN201361668Y、 JP04610375B2, JP2000176585A, above-mentioned patent document is introduced in full and reference is used as.

The milled head includes N number of ring screw rolling wheel, first of incomplete pitch screw of each of which rolling wheel Pitch axial length is set in the following manner：

A) wherein the first rolling wheel will be referred to as by any one rolling wheel, the pitch axial direction of its first incomplete pitch screw Length is equal to its pitch；

B) in the direction of the clock or counterclockwise first of the rolling wheel adjacent with first rolling wheel it is incomplete The pitch axial length of pitch screw reduces 1/N pitch successively, until reducing to 1/N pitch.

It is preferred that, N is more than or equal to 2；It is furthermore preferred that N is equal to 2 or 3 or 4 or 5 or 6 or 7 or 8 or more.

In addition, the original position that rolling wheel body can also be processed from pipe cylinder blank has introduction part simultaneously successively Point, preformed sections and pipe screw thread moulding section.Above-mentioned various pieces can be integral structure or combination knot Structure.Described combining structure refers to that each several part sets up separately on pipe cylinder blank machine direction successively, can be in same rolling On wheel shaft or set up separately on different rolling wheel shafts, even set up separately on different milled heads.

55 ° of the present invention of taper pipe thread or 60 ° of taper pipe thread respectively it is corresponding be it is corresponding domestic or International standard taper pipe thread, referenced standard taper pipe thread includes BSPT, NPT, the metric system and API standard conical tube spiral shell Line.The nominal diameter reference of pipe cylinder blank of the present invention is national pipe standard《Low-pressure fluid conveying welding steel Pipe》(GB3091-2008).Professional and technical personnel in the field, can be according to other countries or international according to the spirit of the present invention Standard, which reasonably sets pipe cylinder blank of the present invention, to be used to roll the external diameter and wall thickness corresponding to different pipe screw threads.

Fig. 1 gives the structural representation of one embodiment comprising four rolling wheel milled heads, Fig. 2 be its A-A to Cross sectional plan view.The milled head 7 in Fig. 1 includes：The spring 77 and regulation spiral shell being connected with the location-plate 111 on slide 11 Bolt 76, spring 77 primarily serve illustrate in the effect that milled head 7 and slide 11 float and are connected, Fig. 2 regulating bolt 761, 762nd, 763 and 764 the amplitude of milled head front and rear floating above and below 7 or so can be controlled.Apply external force to handle 71, pass through leading screw 72, rolling wheel seat 74 can be moved up and down, to adjust the pipe cylinder blank 5 of rolling different-diameter and be in milled head 7 Operating position either off-position.Fixed lower rolling wheel seat 75 and 4 in upper and lower rolling wheel seat 74,75 Rolling wheel 8 is along the circumferential direction evenly distributed；Rolling wheel body 82 and rolling wheel shaft 81 shown in Fig. 1 are free shaft hole matching, axle To there is activity space 781 of the rolling wheel half pitch to a pitch, radially there is the gap activity space 782 of half pitch, this The axially and radially gap of sample sequentially enters rolled tube cylinder hair between ensure that each initial angle of rolling wheel 8 with correct angle Base technique, enables initial 4 rolling wheels to the tooth stage of rolling by most labour-saving work rule freely to tooth, and mitigate rolling significantly To the influence of pipe cylinder blank ovality during pressure.

The hollow spindle 21 first penetrated pipe cylinder blank 5 in the speed change gear of the top of power motor 2 during implementation and clamping Device 4 is into rolling cutoff device 6, and manual rotation is clamped；The pipe cylinder blank 5 clamped by clamping device 4 is in power motor 2 And under the rotation of speed change gear drives, under the rolling manual rotation blank of cutoff device 6, it is chopped to required length；Close dynamic Force motor switch 3, the handle that rolling cutoff device 6 is reversely rotated manually unclamps pipe cylinder blank 5, completes blank station；Manually Handle 71 on revolving-rolling first 7, makes rolling wheel seat 74 move up opening；By moving sliding base rocking handle 10 by the rolling on slide 11 The handle 71 that pressure head 7 is on inter-working position, manual rotation milled head 7 with pipe cylinder blank 5 makes in rolling wheel seat 74 Rolling wheel 8 move down and the initial engagement of pipe cylinder blank 5；Turn on the power motor switch 3, in the presence of rolling wheel 8, pipe cylinder Blank 5 is progressively rolled to taper pipe thread finished product, and the photoelectric induction device 741 on lower rolling wheel seat 75 is touched sense Should, motor stops and rotated backward, now, and operative employee is prompted, and reversely rotates the handle 71 in milled head 7, makes rolling wheel Seat 74 moves up release, and pipe cylinder blank 5 is rapidly separated milled head 7, completes rolling station., can be by moving according to technique needs The rocking handle 10 of dynamic slide moves facing attachment 9 to operating position, and chamfering station is carried out to pipe cylinder blank 5.

Fig. 3 is the structural representation of second preferred embodiment of milled head of the present invention, wherein comprising three rolling wheels Milled head.

In the milled head, including：Three upper rolling wheel seats 74 for being distributed uniformly and circumferentially, by air pressure either Hydraulic pressure either servomotor synchronously moves radially rolling wheel seat 74, the pipe cylinder blank 5 to adjust rolling different-diameter And milled head 8 is in operating position either off-position, while different rolling power can be adjusted to adapt to difference Pipe cylinder blank material.It is other with above-mentioned.

Fig. 4 is the structural representation of the 3rd preferred embodiment of milled head of the present invention, including the rolling of five rolling wheels Pressure head.

The milled head includes：Five upper rolling wheel seats 74 for being distributed uniformly and circumferentially, pass through air pressure either hydraulic pressure Either servomotor synchronously move radially rolling wheel seat 74, to adjust rolling different-diameter pipe cylinder blank 5 and Milled head is in operating position either off-position, while different rolling power can be adjusted to adapt to different Guan Yuan Post blank material.It is other with above-mentioned.

Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any to be familiar with sheet The those skilled in the art in field, without departing from the spirit and scope of the present invention, should can make a variety of equivalent changes Or replace, for example：The structure of the milled head can also be any of the corresponding rolling device that is related in patent set forth below Combinations a kind of or between them：US5699691A, US3058196A, EP282889A2, US3452567A, US3058196A, US20060162411A1, JP10034270A, JP10244340A, JP2003126937A, JP9327742A, CN100542735C, CN2555962Y, SU1344479A1, US20120011912A1, US4617816A, US4785649A, US5870918A, GB1150525A, JP1273637A, SU703197A1.

The mode that terminates of prompting operative employee's rolling station can be that mechanical contact either light such as shows at the mode；Open Or rolling wheel seat can be the air pressure hydraulic pressure either mode such as servomotor on closing rolling cutoff device and being mobile； Rolling wheel can be two, three, five either more than five in above-mentioned rolling wheel seat；It is upper to roll the radially side of work of wheel seat 74 Formula, according to different steel pipe species, size, wall thickness and pipe screw thread tooth form, can control upper rolling wheel with PLC either CNC etc. The speed of the movement of seat 74 and the rolling power applied, make the roundness deformation of pipe cylinder blank 5 minimum and make pipe screw thread thread optimal, rolling The rolling wheel body 82 of pinch roller 8 can be ring screw either screw.

Fig. 5~Fig. 7 is to use axle between present invention rolling wheel body and the rolling wheel that is integrated of rolling wheel shaft and rolling wheel seat Hole coordinates the schematic diagram for having axially and radially activity space for realizing floating connection.

Wherein, rolling wheel body 82 is illustrated in each figure to be embedded in upper rolling wheel seat 74 by the rolling wheel shaft 81 at two ends On axle sleeve 742, mark 781,782 is axial gap, radial clearance respectively.

Fig. 5 is that two ends of spiral rolling wheel body 82 are between outer convex arch jack-post and the cylindrical hole of upper rolling wheel seat 74 Shaft hole matching realizes that floating connection is formed with axially and radially activity space, i.e. axial gap and radial clearance 781,782.

Fig. 6 is that two ends of ring roll wheel body 82 are between cylindrical jack-post and the evagination arc-shaped hole of upper rolling wheel seat 74 Shaft hole matching realize floating connection, be formed with axially and radially activity space, i.e. axial gap and radial clearance 781, 782。

Fig. 7 is that two ends of spiral rolling wheel body 82 are outer convex arch jack-post and the upper evagination arc-shaped hole for rolling wheel seat 74 Between shaft hole matching realize floating connection, be formed with axially and radially activity space, i.e. axial gap and radial clearance 781, 782。

Integral roll extrusion wheel is used in said structure, that is, it is to be integrally formed knot to roll wheel shaft 81 and rolling wheel body 82 Structure, using the largest benefit of integral roll extrusion wheel be roll wheel diameter not by rolling the diameter of bore of wheel body 82 and its diameter of axle 81 shadow Ring, thus rolling wheel diameter can be with very little, such as：It is 10 millimeters, even more small.This is the rolling wheel quantity wound in increase milled head Technical conditions are made.

Fig. 8 is the end of the rolling wheel two assembling needle bearing and rolling that ring roll wheel body of the present invention is integrated with rolling wheel shaft Coordinate the structural representation for having axially and radially activity space for realizing floating connection between wheel seat bearing hole using needle bearing. In diagram, Fig. 8 and Fig. 7 differences are then at employing needle bearing 816 on upper rolling wheel seat 74, use needle bearing 816 The slip rotating effect between rolling wheel shaft 81 and upper rolling wheel seat 74 hole can be substantially improved.

Fig. 9 is present invention rolling wheel body 82 with rolling wheel shaft 81 as integrally formed alternative solution, i.e. use (flat) key The schematic diagram that groove 815 coordinates.

Figure 10 is not floated using gapless axis hole stationary fit between present invention rolling wheel shaft 81 and upper rolling wheel seat 74 Connection, realized by the floating connection between rolling wheel body 82 and rolling wheel shaft 81 freely axially and radially movable feelings Condition.

Figure 11 is using there is gap axis hole to be connected, but not between present invention rolling wheel shaft 81 and upper rolling wheel seat 74 Floating connection, relies primarily on the floating connection between rolling wheel body 82 and rolling wheel shaft 81 freely axially and radially movable to realize Situation, wherein illustrate rolling wheel body 82 and roll wheel shaft 81, rolling wheel shaft 81 and it is upper rolling wheel seat 74 between two positions Radial clearance 7821,7822.

Figure 12~Figure 13 is to be floated to connect using needle roller (bearing) according to present invention rolling wheel body 82 and rolling wheel shaft 81 in Fig. 8 Connect and coordinate to realize freely axial direction and radially movable situation；Rolling wheel body 82 can be substantially improved using needle roller (bearing) 816 With the slip rotating effect between rolling wheel shaft 81.

Figure 14~Figure 16 is present invention rolling wheel body 82 and rolling 81 3 kinds of shaft hole matching floating connections of wheel shaft to realize certainly By the situation of axially and radially activity space, wherein illustrating radial clearance 782.

Wherein, Figure 14 is that the middle part of rolling wheel shaft 81 is evagination arc-shaped structure, and the endoporus of spiral rolling wheel body 82 is cylinder Structure；

Figure 15 is that rolling wheel shaft 81 is cylindrical structural, and the endoporus of ring roll wheel body 82 is evagination arc-shaped structure；

Figure 16 is that the middle part of rolling wheel shaft 81 is evagination arc-shaped structure, and the endoporus of ring roll wheel body 82 is also outer convex arch Structure.

Figure 17-Figure 18 represents that the thread forming portion of present invention rolling wheel body 82 is taper pipe thread and cylinder respectively respectively The structure of pipe screw thread.Wherein, 825 be the diameter for rolling two stomidiums of wheel body, and it is equal to the rolling wheel shaft diameter and adds 0.5 Radially movable space is formed to the pitch of 1 correspondence rolling wheel screw thread.

Figure 19-Figure 23 is the detailed diagram of three parts in present invention rolling wheel body 82, is respectively：Lead-in portion A, preformation Type part B and taper pipe thread moulding section C all kinds of combination diagrams.

Wherein, the preforming portion of lead-in portion A1, straight pipe thread that it is in outer convex arc surface on rolling wheel body 82 that Figure 19, which is, The combining structure for dividing B1 and taper pipe thread moulding section C to be integrated；

Figure 20 is circular conical surface lead-in portion A2, incomplete taper pipe thread preformed sections B2 and circle on rolling wheel body 82 The combining structure that taper pipe thread moulding section C is integrated；

Figure 21 is to include lead-in portion A3, face of cylinder preformed sections B3 and the circle in progressive curved surface on rolling wheel body 82 The combining structure that taper pipe thread moulding section C is integrated；

Figure 22 is to include the lead-in portion A1 and taper pipe thread moulding section C in outer convex arc surface on rolling wheel body 82 The combining structure being integrated；

Figure 23 is to include incomplete straight pipe thread preformed sections B4 and taper pipe thread shaping on rolling wheel body 82 The combining structure that part C is integrated.

Figure 24 give the present invention rolling wheel body 82 three part Split type structures, i.e. lead-in portion A, preformed sections B and Taper pipe thread moulding section C is discrete successively to form the schematic diagram for rolling wheel body 82 on rolling wheel shaft 81.

Figure 25 and Figure 26 are that the axially and radially distribution mode of four rolling wheels in ring screw milled head of the invention is shown It is intended to.

Wherein, Figure 25 is the progressive change of pitch axial length spacing of the start screw threads of four ring screw rolling wheel bodys 82 Schematic diagram；Wherein, the pitch axial length C1 values of first of incomplete pitch screw of first rolling wheel body 82 are 0, second The pitch axial length C2 values of individual rolling first of incomplete pitch screw of wheel body are 1/4, and the 3rd to roll first of wheel body non- The pitch axial length C3 values of complete pitch screw are 1/2, the pitch of the 4th rolling first of incomplete pitch screw of wheel body Axial length C4 values are 3/4.

Figure 26 is four rolling radially-arranged schematic diagrames of wheel shaft 821~824, and centre is pipe cylinder blank 5.

Figure 27 and Figure 28 are the front view and side view of the roll unit of the milled head comprising the present invention.

In the roll unit, including：Support 1, power motor 2, speed change gear and hollow spindle 21, pipe cylinder blank folder Tight device 4, motor switch 3, two axial guide pillars 12, slide 11, above-mentioned milled head 7 and photoelectric induction device 741.On support 1 Portion side, which is provided with a power motor 2, speed change gear and a motor switch 3, the speed change gear of the top of power motor 2, one hollow The main shaft of power motor is connected by main shaft 21, speed change gear with hollow spindle 21；The top of support 1 also has one to be used to clamp described treat Processing pipe cylinder blank and the clamping device 4 for rotating it, clamping device 4 and hollow spindle 21 are concentric and are connected as a single entity；Two Axial guide pillar 12, is arranged on the opposite side on the top of support 1, and set parallel to before and after the center line of hollow spindle 21；Slide 11 are arranged on two axial guide pillars 12, and can making slide 11 by the rotation of moving sliding base rocking handle 10, guide pillar level 12 is slided vertically； Milled head 7 floats and is arranged on slide 11, and the eccentric axial line with hollow spindle 21 is concentric；Photoelectric induction device 741 is set On upper rolling wheel seat 74 in milled head 7, photoelectric induction device 741 is connected with power motor by PLC program, of the invention Roll unit also includes a facing attachment 9 and/or a rolling cutoff device 6；Facing attachment 9, which floats, to be arranged on slide 11 relatively The side of power motor speed change gear 2, the axle center with hollow spindle 21 is concentric；Blank rolling device 6 is arranged on phase on slide 11 To the side of power motor speed change gear 2, the axle center with hollow spindle 21 is concentric.

Milled head of the present invention can not only apply among above-mentioned roll unit, and those skilled in the art is according to this The spirit of invention can also apply to be related in existing rolled thread equipment and technology and patent set forth below by transformation Corresponding roll unit any one or between them possibility combination：US4771625A, JP1273637A, CN102198590A, CN202316603U, CN103264128A, CN1251821C and CN201310058101.X.

Figure 29 is the schematic diagram of pipe cylinder blank 5 used in roll unit of the present invention.

Figure 30 is pipe cylinder blank outside dimension schematic diagram used in prior art device.

Wherein, in Figure 29 pipe cylinder blank 5 used outside dimension, 51 be pipe cylinder blank external diameter of the present invention, and 52 are Pipe cylinder blank wall thickness of the present invention, the pipe cylinder blank internal diameter of 53 national standards.

Figure 30 is pipe cylinder blank outside dimension used in prior art device, and 54 be national standard prior art tube circle Post blank external diameter, 55 be national standard prior art tube cylinder blank wall thickness, the pipe cylinder blank of 56 national standard prior arts Internal diameter.

Meaning of the present invention：Comparison diagram 29 and 30, we can be found that the size of internal diameter 53 and 56 of the two pipe cylinder blank 5 It is the same, but the certain external diameter pipe cylinder blank external diameter 51 and wall thickness 52 of the present invention are both less than Cutting Process either existing pipe Rolling screw-threads technical standard pipe cylinder blank external diameter 54 and wall thickness 55, it is that is of the invention to be brought for the saving of tube material May.

Below with prior art at 6 points of DN20 of national standard (26.67 millimeters of external diameter, 21.07 millimeters of internal diameter, 2.80 millimeters of wall thickness) To contrast the present invention, in 6 points of DN20 of the present invention, (external diameter is 55 ° of pipe screw threads of machining national standard on Q235 galvanized welded pipe cylinder blanks 25.86 millimeters, internal diameter is still 21.07 millimeters, and thickness of pipe wall is then 2.39mm) rolling and processing state on Q235 galvanized welded pipe cylinder blanks 55 ° of pipe screw threads are marked, carry out the huge economic technology superiority that the present invention is furture elucidated.

55 ° of pipe screw thread tooth height of DN20 national standards are 1.162 millimeters, and reach (9 curb) is 16.33 millimeters, cuts taper (1:16) Maximum loss, in place's pipe screw thread the initial segment, is 0.4 millimeter, taper (1:16) least disadvantage amount is in place's pipe screw thread tail tooth (incomplete thread), is 0.164 millimeter.Taper (1:16) it is added together with cutting tooth height loss, original wall thickness is 2.80 millimeters Tubing respectively by skiving to 1.238 millimeters (1.238mm=2.80mm -1.162mm -0.4mm) and 1.474 millimeters of (1.474mm =2.80mm -1.162mm -0.164mm), that is to say, that having cut rear pipe screw thread section wall thickness thickness, (pipe screw thread afterbody is incomplete Part) there was only 1.474 millimeters, and cut rear pipe screw thread section wall thickness thinnest part and there was only 1.238 millimeters.It is former according to design safety Then, the combustion gas dedicated pipe of 2.80mm wall thickness is actually according to steel pipe thinnest part 1.238mm wall thickness after cutting after having cut Pipe is being used, and theoretical maximum operating pressure only has about 13.1MPa.[computational methods：(2×0.6×235×1.238)/26.67≈ 13.1MPa]；Compared to the bearing capacity 29.61MPa [computational methods of original 2.80 millimeters of wall thickness steel tubes of DN20：(2×0.6× 235 × 2.8)/26.67 ≈ 29.61MPa] it have dropped 55.765% [computational methods：(29.61–13.1)/29.61≈ 55.76%].

With the present invention identical material Q235 6 points of DN20 galvanized welded pipe cylinder blanks, external diameter be changed into 25.86 millimeters it is (interior Footpath is still 21.07 millimeters, and thickness of pipe wall is then 2.39 millimeters), do a contrast with present invention rolling pipe screw thread:According to calculating and in fact The linear mass of the nominal basis of pipe screw thread section is unchanged after border situation, rolling, " the wall thickness of " wall thickness " and original tubing after rolling 2.39 millimeters " it is the same.According to above-mentioned formula, we can calculate theoretical maximum operating pressure about 26.06MPa.[meter Calculation method：(2×0.6×235×2.39)/25.86≈26.06MPa].The identical material steel pipe rolling pipe screw thread of DN20 of the present invention Or the theoretical maximum operating pressure of pipe joint is approximately more than the wall thickness 2.80mm pipe screw threads of cutting or 100% [calculating side of pipe joint Method：The ≈ 99.77% of (26.17-13.1)/13.1], while but saving the [computational methods of steel 12.65% or so：From DN20 states Two kinds of wall thickness steel tube Unit Weights that family's standard looks into 2.8 millimeters and 2.4 millimeters are respectively 1.66 and 1.45 kilograms every millimeter [≈ of (1.66-1.45)/1.66 12.65%].

As described above, the present invention is on the basis of pipe screw thread bearing capacity 100% is improved, material cost have dropped on the contrary 13%.

Another embodiment, with reference to Fig. 1,27,28,29 and 30 and described calculation formula, is further described Specific processing and implementation step.

According to existing national standard《Low-pressure fluid conveying welded still pipe》(GB3091-2008) DN32 combustion gas is special zinc-plated The external diameter of steel pipe is 42.40 millimeters, and common wall thickness is 3.50 millimeters, and internal diameter is 35.40 millimeters.Using 55 ° of pipe spiral shells of existing cutting Line technique is processed, and tooth is high 1.479 millimeters, 25.40 millimeters of pipe screw thread length (11 curb), comprehensive tooth height and taper cutting loss, Thickness of steel pipe is from original 3.50 millimeters 1.50 millimeters being reduced to, but internal diameter 56 keeps constant.Using existing rolled tube Screw thread technique, using large-tonnage axial punch device, processes 1 first:16 circular conical surface；Then with circular cone rolling wheel processing pipe spiral shell Line product, but cause following point：

1. the internal diameter reduction volume of pipe screw thread is 3.11 millimeters, i.e., the pipe diameter 56 after existing rolling techniques processing is minimum 32.29 millimeters, it is 8.8% that steel tube inner hole, which reduces percentage, is far longer than 3.4% steel tube inner hole that country and international standard allow Reduce percentage；

2. each pipeline network construction erecting bed can not possibly be furnished with large-tonnage axial punch equipment, dedicated for processing circular cone Face；

3. stamping pressure is when the conical surface shapes, at body material, particularly steel pipe original outer diameter and circular conical surface common factor Welded tube welding seam, causes recessive and dominant destruction, and potential safety hazard is left to rolled tube screw product.

Therefore, using a kind of milled head and its equipment for being used to roll pipe screw thread of the present invention

With the pipe cylinder blank of application equipment processing.First, by the external diameter of the certain external diameter steel pipe blank 5 of the foregoing present invention It is placed in for 41.17 millimeters of DN32 by processing length requirement among clamping device 4 and hand-operated clamping, then by the rolling having already turned on Cutoff device 6 is pressed manually to be embedded in pipe cylinder blank 5；Opening motor switch 3 rotates pipe cylinder blank 5, manually rotated handle The blank rolling wheel rolled in cutoff device 6 is pressed into technological requirement radial feed, 6000 millimeters of cylinder blank 5 are cut off in rolling Length reversely rotates handle manually to required 2750 millimeters of length, opens rolling cutoff device, by rocking handle 10, removes manually Rolling cutoff device 6 on slide 11, completes rolling blank processing, closes motor switch 3.

During processing pipe screw thread, according to rolling technology needs, the facing attachment 9 of floating can in the lump be used.It is logical The end endoporus that the axial feed of facing attachment 9 is pushed into steel pipe 5 by rocking handle 10 manually is crossed, motor is opened, chamfering starts, rocking handle of holding with a firm grip 10, needed to complete chamfering according to technique, close motor.

Handle 71 on manual rotation milled head opens milled head 7, by rocking handle 10 manually by the axial direction of pipe screw thread milled head 7 Working position is pushed into, reversely rotating handle 71 makes the contacting pipe cylinder blank 5 of rolling wheel 8；Motor is opened, pipe screw thread rolling starts, Using axial force is rolled, pipe screw thread milled head 7 is automatic along motor drive direction axial feed, the rolling in the milled head 7 on slide 11 When pinch roller 8 moves axially to the head of pipe screw thread, photoelectric induction device 741 works, motor reversal, behind pipe screw thread milled head axial direction Move back, handle 71 is rotated backward manually, rapid axial pushes milled head 7 open, close motor switch 3, product rolling and processing is completed.

They are compared discovery, a kind of milled head and its equipment for being used to roll pipe screw thread of the invention and application should The otherness of pipe cylinder blank and the manufacture device of the conical tube external screw thread product of prior art, method and product that equipment is processed It is clear that thus bringing its advantage to be：

1. saving axial punch than rolling pipe screw thread technique at present, walked with the current 100% cutting mantle fiber technique used Suddenly substantially close to processing unit (plant) simple light meets the current use habit of people, is easy to large-scale popularization to use；

2. progressively complete pipe screw thread processing using rolling rotating technics, it is to avoid steel pipe body, particularly welded tube are welded Seam, recessive and dominant destruction improves screw thread compactness, threaded connection intensity and sealing security performance, while improving pipe The concentricity of screw product；

3. the endoporus reduction volume of pipe screw thread product meets existing international and national standard；

4. the cutting mantle fiber used than current 100% processes pipe screw thread technique, its steel pipe of the pipe screw thread product of rolling forming Unit weight is the same with the original steel pipe unit weight before rolling and acted on by the flow harden that rolls, its Bearing capacity improves about 100% than the cutting tube screw product of corresponding standard.

5. it is clear that reduction steel pipe can be inquired on the basis of pipe screw thread connection safety is improved using the present invention External diameter or wall thickness, so as to reduce steel for steel pipes amount, reach the environmental protection purpose of energy-saving and emission-reduction.

Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any to be familiar with sheet The those skilled in the art in field, without departing from the spirit and scope of the present invention, should can make a variety of equivalent changes Or replace, do not limited by steel pipe species, size and pipe screw thread tooth form.For example：It is seamed seamless stainless-steel pipe, seamed seamless Black pipe and other materials steel pipe, its external diameter can go up lower deviation within the specific limits, and wall thickness can further be thinned；For rolling The pipe cylinder blank external diameter of 55 ° and 60 ° pipe screw threads of processing is foregoing rolled tube cylinder blank external diameter computational methods and experiment number According to, and for metric system pipe screw thread, other standard pipe external screw threads (such as oil API pipe screw threads, Aero-Space particular tube spiral shell) in other words, Other in other words non-1：16 taper pipe threads and the pipe cylinder blank more than DN150, are discrepant, should pass through spirit of the invention Principle is adjusted.Certainly, for the preferable steel pipe of quality, particularly seamless steel pipe, its outside dimension and wall thickness can be by adjusting The foregoing milled head of the whole present invention suitably rolls power and the rolling time carrys out appropriate sizing so as to cylinder needed for rolling and conical tube Screw product.Milled head is not limited by structure, rotation and the moving direction of foregoing milled head device simultaneously, for example：It is foregoing Upper rolling wheel seat is slided and the structure of lower rolling wheel seat fixation can be that rolling wheel seat can be slided or lower rolling up and down Wheel seat is slided and the structure of upper rolling wheel seat fixation, and the set-up mode that wheel seat is rolled up and down can be left and right rolling wheel seat setting side Formula etc..Therefore, protection scope of the present invention is worked as the scope defined depending on appended the application claim and is defined.

Claims (17)

1. a kind of milled head for being used to roll pipe screw thread, including at least two rolling wheels and the rolling wheel that the rolling wheel is set Seat, wherein the rolling wheel comprising one rolling wheel body and one rolling wheel shaft, the rolling wheel body include a rolling wheel pipe screw thread into Type part, it is characterised in that the rolling wheel body phase correspondence rolling wheel seat has an axle on the direction along the rolling wheel shaft To activity space, the axial distance of the axial activity space is the 0.5 of rolling wheel pipe screw thread moulding section correspondence screw thread Individual pitch is to 1 pitch；Wherein, the rolling wheel body phase radially has one for the rolling wheel seat along the rolling wheel shaft Radially movable space, the radial distance in the radially movable space is no more than rolling wheel pipe screw thread moulding section correspondence spiral shell 0.5 pitch of line, to ensure that the rolling wheel sequentially enters rolling, is realized freely to tooth.

2. the milled head as claimed in claim 1 for being used to roll pipe screw thread, it is characterised in that the axial activity space and institute Stating radially movable space is realized by the structure in following any group：

A) floating connection between the rolling wheel and the rolling wheel seat；

B) floating connection between the rolling wheel body and the rolling wheel shaft；

C) a) group and b) combination of group；

The floating connection is selected from：Axis hole floating connection or bearing floating connection.

3. the milled head as claimed in claim 1 for being used to roll pipe screw thread, it is characterised in that the axial activity space and institute Stating radially movable space is realized by the floating connection between the rolling wheel and the rolling wheel seat, and the rolling The rolling wheel body of wheel is to be integrally formed or keyway cooperation with rolling wheel shaft；

The floating connection is selected from：Axis hole floating connection or bearing floating connection.

4. the milled head as claimed in claim 2 for being used to roll pipe screw thread, it is characterised in that the axis hole floating connection bag Include：

D) the rolling wheel body shaft bore surface and the rolling wheel shaft surface are any in outer convex arch or be outer convex arch Contact connection；Or

E) surface is any in outer convex arch or equal at the axis hole link position between the rolling wheel shaft and the rolling wheel seat Connected for the contact of outer convex arch；Or

F) the rolling wheel body shaft bore surface is connected with the contact that the rolling wheel shaft surface is the face of cylinder, and the rolling wheel Body axis hole port diameter is equal to pitch of the rolling wheel shaft diameter plus 0.5 to 1 correspondence rolling wheel screw thread；Or

G) surface is the contact connection on the face of cylinder at the axis hole link position between the rolling wheel shaft and the rolling wheel seat, And the rolling wheel seat axis hole port diameter is equal to the rolling wheel shaft diameter and corresponds to rolling wheel screw thread plus 0.5 to 1 Pitch.

5. the milled head as claimed in claim 3 for being used to roll pipe screw thread, it is characterised in that the axis hole floating connection bag Include：

H) surface is any curved at axis hole link position between the rolling wheel shaft and the rolling wheel seat or is arc Contact connection；Or

I) surface is the contact connection on the face of cylinder at the axis hole link position between the rolling wheel shaft and the rolling wheel seat, And the rolling wheel seat axis hole port diameter is equal to the rolling wheel shaft diameter and corresponds to rolling wheel screw thread plus 0.5 to 1 Pitch.

6. the milled head as claimed in claim 2 for being used to roll pipe screw thread, it is characterised in that the bearing floating connection is logical Cross what needle roller connection was realized.

7. the milled head as claimed in claim 3 for being used to roll pipe screw thread, it is characterised in that the bearing floating connection is logical Cross what needle roller connection was realized.

8. being used for as described in claim 1 to 7 is any rolls the milled head of pipe screw thread, it is characterised in that the pipe screw thread into The shape of type part is taper pipe thread or straight pipe thread.

9. the milled head as claimed in claim 8 for being used to roll pipe screw thread, it is characterised in that the rolling wheel body is in the pipe Thread forming portion front end further comprises a preformed sections, the shapes of the preformed sections include the face of cylinder, circular conical surface, Complete straight pipe thread, incomplete straight pipe thread, incomplete taper pipe thread or its combination.

10. the milled head as claimed in claim 8 for being used to roll pipe screw thread, it is characterised in that the rolling wheel body is described Pipe screw thread moulding section front end further comprises lead-in portion, and the shape of the lead-in portion includes the conical surface, cambered surface, progressive curved surface Or its combination.

11. the milled head as claimed in claim 9 for being used to roll pipe screw thread, it is characterised in that the rolling wheel body is described Preformed sections front end further comprises lead-in portion, the shape of the lead-in portion include the conical surface, cambered surface, progressive curved surface or its Combination.

12. the milled head as claimed in claim 11 for being used to roll pipe screw thread, it is characterised in that the importing of the rolling wheel body Partial to be shaped as cambered surface, the preformed sections are shaped as straight pipe thread, and the pipe screw thread moulding section is shaped as Taper pipe thread.

13. the milled head as claimed in claim 8 for being used to roll pipe screw thread, it is characterised in that the milled head includes N number of ring Shape rolling screw-threads wheel, the pitch axial length of first of incomplete pitch screw of each of which rolling wheel is set in the following manner：

J) wherein the first rolling wheel will be referred to as by any one rolling wheel, the pitch axial length of its first incomplete pitch screw Equal to its pitch；

K) in the direction of the clock or counterclockwise first of incomplete pitch of the rolling wheel adjacent with first rolling wheel The pitch axial length of screw thread reduces 1/N pitch successively, until reducing to 1/N pitch；

Wherein, N is the natural number more than or equal to 2.

14. the as claimed in claim 12 milled head for being used to roll pipe screw thread, it is characterised in that the lead-in portion, described Preformed sections and the pipe screw thread moulding section are integral structures, or combining structure.

15. a kind of pipe screw thread roll unit for including milled head described in any of the above-described claim, is managed applied to processing one Cylinder blank, further comprises：Support, power motor and speed change gear, Workpiece clamping device, hollow spindle, motor switch, two Root axial direction guide pillar, slide；

Wherein, the upper part of the frame side is provided with a power motor and a speed change gear and a motor switch, the power motor There is a hollow spindle top, and the main shaft of the power motor is connected by the speed change gear with the hollow spindle；

The upper part of the frame also has a clamping device for being used to clamp the pipe cylinder blank to be processed and rotate it, described Clamping device and the hollow spindle are concentric and are connected as a single entity；

Two axial guide pillars are arranged on the opposite side of the upper part of the frame, and parallel to the hollow spindle center line before and after Set；

The slide is arranged on described two axial guide pillars, can be slided along the axial guide pillar level；

The milled head floats and is arranged on the slide, concentric with the hollow spindle.

16. pipe screw thread roll unit as claimed in claim 15, it is characterised in that the rolling wheel seat of the milled head is divided into one Upper to roll wheel seat and once roll wheel seat, the upper rolling wheel seat is slide construction, and the lower rolling wheel seat is fixed structure；Institute State rolling wheel seat and floated by a spring with one group of adjustment bolt with the slide in the roll unit and is connected；It is wherein described Two rolling wheels are respectively arranged with upper rolling wheel seat and the lower rolling wheel seat.

17. roll unit as claimed in claim 15, it is characterised in that the roll unit also include a facing attachment and/ Or an a rolling cutoff device and/or photoelectric induction device；

Wherein, the facing attachment floats and is arranged on relatively described power motor and the speed change gear side on the slide, It is concentric with the hollow spindle；

The rolling cutoff device, is arranged on the slide relatively described power motor speed change gear side, and described hollow Main shaft is concentric；

Described photoelectric induction device is arranged on the rolling wheel seat in the milled head.